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CN-224214814-U - Coil guide head assembly

CN224214814UCN 224214814 UCN224214814 UCN 224214814UCN-224214814-U

Abstract

The utility model provides a coil pilot head assembly, which comprises a pilot head and a coil junction box, wherein an assembly cavity is formed in the coil junction box, the pilot head is arranged on one side of the coil junction box, the pilot head comprises a sleeve and a base, the sleeve is arranged in the assembly cavity, the outer wall of the sleeve is propped against the inner wall of the assembly cavity, the base is sleeved on the outer wall of the sleeve, the joint of the base and the sleeve is fixed through welding, the end face of the base, which is close to the coil junction box, is propped against the coil junction box, and the base and the sleeve are arranged in a split mode to form different parts, so that the processing cost is low, and when different models are needed, only the base or the sleeve with corresponding sizes is needed to be replaced, and the wildness is greatly improved.

Inventors

  • CAO KEXING
  • YE FEI
  • ZHANG CHONG
  • SHAN PENGJUN
  • CHEN GUANGJING

Assignees

  • 星宇电子(宁波)有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (8)

  1. 1. A coil pilot head assembly is characterized by comprising a pilot head (1) and a coil junction box (2), wherein an assembly cavity (2.1) is formed in the coil junction box (2), the pilot head (1) is installed on one side of the coil junction box (2), the pilot head (1) comprises a sleeve (1.1) and a base (1.2), the sleeve (1.1) is arranged in the assembly cavity (2.1), the outer wall of the sleeve (1.1) is abutted against the inner wall of the assembly cavity (2.1), the base (1.2) is sleeved on the outer wall of the sleeve (1.1), the joint of the base (1.2) and the sleeve (1.1) is fixed through welding, and the end face, close to the coil junction box (2), of the base (1.2) is abutted against the coil junction box (2).
  2. 2. The coil pilot head assembly according to claim 1, wherein an abutting groove (1.11) is formed in the outer wall of the sleeve (1.1), the side wall of the abutting groove (1.11) is equal to the end face of the coil junction box (2), an abutting section (1.21) is arranged on the base (1.2), and the abutting section (1.21) is arranged in the abutting groove (1.11) in a clamping fit mode.
  3. 3. The coil pilot head assembly according to claim 1, wherein an outer expansion section (1.12) is arranged at the lower end of the sleeve (1.1), an inclined surface (1.22) is arranged on the base (1.2), and the inclined surface (1.22) is attached to the outer wall of the outer expansion section (1.12).
  4. 4. The coil pilot head assembly according to claim 1, wherein the mounting cavity (2.1) is provided with a mounting notch (2.2) at an opening near one side of the pilot head (1).
  5. 5. The coil pilot head assembly according to claim 1, wherein a first inner core (3) is coaxially arranged in the pilot head (1), a conical spring (6) is arranged between the first inner core (3) and the base (1.2), a second inner core (4) is arranged on the other side of the coil junction box (2), and the first inner core (3) and the second inner core (4) are coaxially arranged.
  6. 6. The coil pilot head assembly according to claim 5, wherein a plug-in portion (4.1) is arranged on one side, close to the sleeve (1.1), of the second inner core (4), the plug-in portion (4.1) is arranged in the sleeve (1.1) in a plug-in fit mode, and the outer wall of the plug-in portion (4.1) abuts against the inner wall of the sleeve (1.1).
  7. 7. The coil pilot head assembly according to claim 5, wherein the upper end of the second inner core (4) is provided with a fastener (5), the fastener (5) comprises a flat washer (5.1), a locking washer (5.2) and a locking nut (5.3), one end of the second inner core (4) is provided with a step groove (4.2), the end face of the step groove (4.2) is equal to the upper end face of the coil junction box (2), the flat washer (5.1) is sleeved on the second inner core (4), and the lower end face of the flat washer (5.1) is simultaneously propped against the end face of the step groove (4.2) and the upper end face of the coil junction box (2).
  8. 8. The coil pilot head assembly according to claim 7, wherein a limiting groove (4.3) is formed in a side wall, away from one side of the assembly cavity (2.1), of the second inner core (4), the locking nut (5.3) is arranged in the limiting groove (4.3) in a clamping fit mode, the locking washer (5.2) is arranged between the flat washer (5.1) and the locking nut (5.3), one end of the locking washer (5.2) abuts against the upper end face of the flat washer (5.1), and the other end abuts against the lower end face of the locking nut (5.3).

Description

Coil guide head assembly Technical Field The utility model relates to the technical field of coil pilot heads, in particular to a coil pilot head assembly. Background In fluid control systems, pilot head assemblies are often used to control the opening and closing of a main valve, which is driven by a solenoid to achieve automated control. The existing coil guide head assembly generally adopts an integrated processing structure, so that the production cost is greatly increased, the assembly is complex, the maintenance is difficult, and the coil guide head assembly is used. In addition, adopt screw thread direct fixation often between inner core and the terminal box in traditional structure, easily become flexible after long-term use, influence control accuracy and reliability. Meanwhile, the inner cores in the existing components are in rigid connection with the base, so that the inner cores cannot adapt to the dimensional change caused by temperature change or vibration, and the inner cores are required to be integrally replaced when different sizes are required, and the production cost is increased. Therefore, it is necessary to provide a coil lead head assembly that is rational in structure, easy to assemble, reliable in sealing, and has good vibration resistance. Disclosure of utility model Aiming at the defects and shortcomings of the prior art, the utility model provides a coil pilot head assembly, and provides the following technical scheme for realizing the purposes of convenient assembly and good anti-drop effect. The coil pilot head assembly comprises a pilot head and a coil junction box, wherein an assembly cavity is formed in the coil junction box, the pilot head is installed on one side of the coil junction box, the pilot head comprises a sleeve and a base, the sleeve is arranged in the assembly cavity, the outer wall of the sleeve abuts against the inner wall of the assembly cavity, the base is sleeved on the outer wall of the sleeve, the joint of the base and the sleeve is fixed through welding, and the end face, close to the coil junction box, of the base abuts against the coil junction box. Compared with the prior art, the utility model realizes the accurate positioning of the sleeve in the junction box by propping the outer wall of the sleeve against the inner wall of the assembly cavity, the split type fixing of the base and the sleeve is realized by welding, the connection strength is enhanced, the loosening caused by vibration or impact is avoided, the base and the sleeve are easy to process by split type arrangement of different parts, the processing cost is low, and when different models are needed, only the base or the sleeve with corresponding sizes is needed to be replaced, and the wildcard property is greatly improved. Further, an abutting groove is formed in the outer wall of the sleeve, the side wall of the abutting groove is equal to the end face of the coil junction box in height, an abutting section is arranged on the base, and the abutting section is arranged in the abutting groove in a clamping and matching mode. Through the improvement, the clamping fit of the abutting groove and the abutting section increases the contact area of the sleeve and the base, further improves the anti-falling effect, ensures that the side wall of the abutting groove is equal to the end face of the coil junction box, ensures that the end faces of all parts after assembly are flush, and is convenient for subsequent installation and sealing. Further, the lower end of the sleeve is provided with an outer expansion section, the base is provided with an inclined plane, and the inclined plane is attached to the outer wall of the outer expansion section. Through the improvement, the outer expansion section and the inclined surface can play a guiding role when the guide head is inserted into the coil junction box, and meanwhile, the guide and positioning roles can be played in the welding process, so that the assembly precision is improved. Further, an installation notch is formed in the opening of the assembly cavity, which is close to one side of the pilot head. Through the improvement, the installation notch that sets up provides the space of dodging for the insertion of sleeve and base, produces the interference when avoiding the assembly, has reduced the installation degree of difficulty. Further, a first inner core is coaxially arranged in the guide head, a conical spring is arranged between the first inner core and the base, a second inner core is arranged on the other side of the coil junction box, and the first inner core and the second inner core are coaxially arranged. Through the improvement, the conical spring can provide stable axial elastic force to ensure that the first inner core is reliably reset, and the first inner core and the second inner core are coaxially arranged to ensure the straightness of the valve core, reduce friction and abrasion and improve response speed and sealing eff